Flush valve



G. B. STACK.

FLUSH VALVE.

APPLICATION FILED MAY H5, 1920.

1,409,602. Patented Mar. 14,1922.

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A TTORNEY UNITED STATES PATENT OFFICE.

GEORGE B. STACK, OF SACRAMENTO, CALIFORNIA.

FLUSH VALVE.

' Application filed May is,

T o aZZ whom it may concern:

Be it known that I, GEORGE B. STACK, a citizen of the United States,residing at Sacramento, in the county of Sacramento, State of California, have invented certain new and useful Improvements in Flush Valves; and I do declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvements in flush valves such as are especially used in connection with toilets, being of the type which does away with the necessity of a tank or reservoir. V

The principal object of my invention is to devise a flush valve of thetype and for the purpose specified, in which the parts are so constructed and arranged thatthere will be no passages which can be easily stopped up and no valves directly in the line of the flow of water to become worn or eaten by foreign matter in the water. By this means the friction of operation is greatly reduced, and a free and unobstructed flow of the water is permitted. 7

A further object is to provide a means for regulating the amount ofwater which will be discharged from the valve at one operation, and so as to give equal results whether a high or low water pressure is obtainable.

A further object of the invention is to produce a simple and inexpensive device, and yet one which will be exceedingly effective for the purposes for which it is designed.

These objects I accomplish by means of such structure andxrelative arrangement of parts as will fully appear by a perusalof the following specification and claims. In the drawingsjsimilar characters of reference indicate corresponding parts in the several views.

Fig. 1 is a side elevation of my flush valvc showing the same connected to a toilet.

Fig. 2 is an enlarged vertical section of the valve, taken on a line 22of Fig. 1.-

Fig. 3 is a fragmentary vertical section through a by-pass and valve.

Referring now more particularly to the characters of reference on the drawings, the numeral 1 denotes a cylindrical and vertical body or chamber, having atits lower end a discharge passage 2 provided with a con- Speeification of Letters Patent.

Patented Mar. 14, 1922.

1920. Serial No. 382,415.

pling 3 for connection to a the bowl of a toilet 5.

The upper end of the passageway 2 is pro'vlcled with a flat smooth rim 6 to form a seatfor a valve 7, movable vertically relative to the rim, and normally seated thereon by the force of gravity. Above the valve 7 and having a close slidingfit in the chamber 1 is a doubleleathercup plunger 8 of any ordinary type. the plunger and valve being spaced apart a suitable distance and connected together to form a rigid unit by a stem 9.

A cap 10 is removably screwed on top of the body 1, and the head of the plunger is provided with an adjustable screw 11 projecting therefrom and adapted to abut against the cap 10 when the valve rises. In

pipe 4 leading to this manner the amount of movement iilloaved the valve and plunger may be reguate the valve and plunger by means of a tapered hole 14?.

A boss 15 projects from the body adjacent the hole- 14 and has a screw 16 threaded therein which is provided with a tapered pin or valve 16 normally seating in the orifice 14.

A very small hole 17 in the pin 16 leads from the outer end thereof to holes 17 therein in alinement with the vertical portion of the bypass, the hole 17 widening out toward the, holes 17. The shape of said hole prevents the same from being clogged by sediment or other foreign matter in the water. 1

By regulating this valve, the quantity of water entering the bypass in a given time may be held. constant, irrespective of whether a high or sluggish water pressure is had.

With an ordinary medium-high pressure, suflicient water will pass through the hole 17 to fill the chamber above the plunger in a given time. If the pressure is sluggish however, the valve is retracted in the hole 14:, thus allowing the wa er to enter the by-pass around said valve instead of forcing it to pass through the hole 17. In this manner the same period of time of filling of the'said chamber may be had as with the higher pressure.

The cap 18 of the boss 15 is provided with a rubber bumper 19 to form a stop for the seat cover 20 of the toilet when such cover is raised.

Below the valve 7 and conn'nunicating with the discharge passage 2 is a port 21 leading to a small chamber 22 formed with the body 1 and projecting from theside thereof. Leading to this chamber from the upper end of the body 1 above the plunger 8 is a bypass 23 relatively greater than the bypass 14:.

The lower end of this bypass where itenters the chamber 22, is formed with a seat 23, and is normally closed against the water pressure by a valve 24:. This valve is connected to an actuating handle 25, turnable relative to the chamber 22, this valve and handle forming part of a standard type of construction so that with a slight movement of the handle to one side or'the other the valve 23 will be drawn away :iro'm the seat 23-, a spring 26 being about the valve so that when the handle is released the valve will again close the bypass. The operation of the device is as follows r Water under pressure is constantly'in the chamber 1 between the valve 7 and plunger 8, the space abovethe plunger being also filled by reason of the bypass l lj When it is desired to'flush thetoilet, the

' handle 25 is actuated, thus opening the bypass 23 into the chamber 22. The water from thechamber 1 above the plunger then passes through the bypass into the chamber 22, thence through port 21 into the discharge passage 2. This rush of water from the upperend of the chamber 1 is much faster than the flow of water thereinto through'the bypass 14, on account of the difference in size of the openings. A reduction in pressure above the plunger'will thus result, causing the latter to rise in the chamber and lift the valve 7 from its seat, such raising movement being assisted by the inis thus'free to pass into the toilet through flowing water under the plunger and fur- :--,ther expelling the remaining water" from I 7 above the plunger. Y .6

The water flowing through an intake '12 the passageway 2.

This "flow will continue until the rela-' tively slow flow through the bypass 14;, on account of the valve member 16, being practically a seepage or bleed hole, has'filled the chamber above the plunger and restored the pressure to normal, when the valve will seat of its own weight, thus cutting oii the flow of. water into the toilet.

Itwill thus be evident that the period or" opening of the valve 7 and the amount of water admitted o the toilet depends entirely on the rapidity of the filling up of the chamber 1 above the plunger, which, as be fore stated, may be regulated to a nicet v for slow, medium or quick movement of the plunger.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the object of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my intention what I claim as newand useful and desire to secure by Letters Patent, is 1 I 7 1. In a flush valve chamber having abypass leading from the lower to the upper portion thereof, an adjustable needle valve projecting through the bypass and into one of the openings thereof into the chamber; said valve being provided \vitha transverse orifice in the" plane of the bypass and with a relatively small longitudinal orifice leading from the transverse orifice to the chamber end of the valve. 4 A I 2. In a flush valve chamber having'a bypass leading from theilower to the upper portion thereohau adjustable needle valve projecting through the bypass and into one of the openings thereof into the chamber,

said valvebeing provided with a transverse V orifice in the planeot the by-pass' and with a longitudinal orifice leading from the chamber end of the valve to the transverse orihce, sald orlllce being relatively small at the chamber end and widening out to its junction with the transverse orifice,.whereby said longitudinal orificewillnotbecome choked with possible foreign matter,'the direction of flow of water: being from the chamber end thereof inwardly.

In testimony whereof I affix my signature -f.' 

